Issue #2507031 by claudiu.cristea, dawehner, Wim Leers, mitrpaka, webflo, catch, piyuesh23, beejeebus: Optimize automatic cron subscriber by moving automatic cron to a module
Issue #2233787 by alexpott, xjm | tim.plunkett: Move default configuration into extension/config/install to clarify its purpose.
Issue #1986090 by markpavlitski, jessebeach: Profile config does not overwrite module default config on install (system.cron.yml).
Issue #1934700 by nick_schuch: Automated cron runs should only be enabled by default for Standard profile.
- Patch #1493098 by sun, jcisio, pcambra, Pol, wamilton, Rok Žlender, beejeebus: convert cron settings to configuration system.
Issue #1470824 by alexpott, sun: Fixed XML encoder can only handle a small subset of PHP arrays, so switch to YAML.
